build(rdv3): add build config for rdv3 in tftf

Add tftf build config for the base RD-V3 platform

Change-Id: Ie446c62cb6d0e14ff511e7fedf75b08d758e09c9
Signed-off-by: Jerry Wang <Jerry.Wang4@arm.com>
diff --git a/tftf_config/fvp-rdv3-default b/tftf_config/fvp-rdv3-default
new file mode 100644
index 0000000..3baac0f
--- /dev/null
+++ b/tftf_config/fvp-rdv3-default
@@ -0,0 +1,5 @@
+CROSS_COMPILE=aarch64-none-elf-
+NRD_PLATFORM_VARIANT=0
+PLAT=rdv3
+ENABLE_REALM_PAYLOAD_TESTS=1
+BRANCH_PROTECTION=0